package handlerfactory

import (
	"fmt"
	"git.aiterp.net/lucifer/new-server/models"
)

func CreateHandlers(
	config FactoryConfig,
	scenes []models.Scene,
	existing []models.EventHandler,
) ([]models.EventHandler, []models.EventHandler) {
	switch config.Mode {
	case SceneDimmer:
		return sceneDimmer(config, scenes, existing)
	default:
		return []models.EventHandler{}, []models.EventHandler{}
	}
}

func sceneDimmer(
	config FactoryConfig,
	scenes []models.Scene,
	existing []models.EventHandler,
) ([]models.EventHandler, []models.EventHandler) {
	kind, refValue := models.ParseFetchString(config.Target)

	toRemove := make([]models.EventHandler, 0, 8)
	for _, old := range existing {
		if old.Conditions["deviceId"].EQ == config.TriggerDeviceID {
			toRemove = append(toRemove, old)
		}
	}

	resolvedScenes := make([]models.Scene, 0, len(config.SceneNames))
	for _, name := range config.SceneNames {
		for _, scene := range scenes {
			if name == scene.Name {
				resolvedScenes = append(resolvedScenes, scene)
				break
			}
		}
	}

	if len(scenes) < 2 {
		return []models.EventHandler{}, []models.EventHandler{}
	}

	handlers := make([]models.EventHandler, 0, len(scenes)+4)

	handlers = append(handlers, models.EventHandler{
		EventName: "ButtonPressed",
		Conditions: map[string]models.EventCondition{
			"deviceId":   {EQ: config.TriggerDeviceID},
			"buttonName": {EQ: "On"},
		},
		OneShot:     false,
		Priority:    100,
		TargetKind:  kind,
		TargetValue: refValue,
		Actions:     models.EventAction{SetPower: &myTrue},
		From:        -1,
		To:          -1,
	})

	handlers = append(handlers, models.EventHandler{
		EventName: "ButtonPressed",
		Conditions: map[string]models.EventCondition{
			"deviceId":   {EQ: config.TriggerDeviceID},
			"buttonName": {EQ: "Off"},
		},
		OneShot:     false,
		Priority:    100,
		TargetKind:  kind,
		TargetValue: refValue,
		Actions:     models.EventAction{SetPower: &myFalse},
		From:        -1,
		To:          -1,
	})

	for i, scene := range resolvedScenes {
		if i > 0 {
			handlers = append(handlers, models.EventHandler{
				EventName: "ButtonPressed",
				Conditions: map[string]models.EventCondition{
					"deviceId":   {EQ: config.TriggerDeviceID},
					"buttonName": {EQ: "DimDown"},
					"any.scene":  {EQ: fmt.Sprintf("%d", scene.ID)},
				},
				OneShot:     false,
				Priority:    100,
				TargetKind:  kind,
				TargetValue: refValue,
				Actions: models.EventAction{SetScene: &models.DeviceSceneAssignment{
					SceneID:    resolvedScenes[i-1].ID,
					Group:      refValue,
					DurationMS: 0,
				}},
				From: -1,
				To:   -1,
			})
		}

		if i < len(resolvedScenes)-1 {
			handlers = append(handlers, models.EventHandler{
				EventName: "ButtonPressed",
				Conditions: map[string]models.EventCondition{
					"deviceId":   {EQ: config.TriggerDeviceID},
					"buttonName": {EQ: "DimUp"},
					"any.scene":  {EQ: fmt.Sprintf("%d", scene.ID)},
				},
				OneShot:     false,
				Priority:    100,
				TargetKind:  kind,
				TargetValue: refValue,
				Actions: models.EventAction{SetScene: &models.DeviceSceneAssignment{
					SceneID:    resolvedScenes[i+1].ID,
					Group:      refValue,
					DurationMS: 0,
				}},
				From: -1,
				To:   -1,
			})
		}
	}

	handlers = append(handlers, models.EventHandler{
		EventName: "ButtonPressed",
		Conditions: map[string]models.EventCondition{
			"deviceId":   {EQ: config.TriggerDeviceID},
			"buttonName": {EQ: "DimDown"},
		},
		OneShot:     false,
		Priority:    90,
		TargetKind:  kind,
		TargetValue: refValue,
		Actions: models.EventAction{SetScene: &models.DeviceSceneAssignment{
			SceneID:    scenes[len(scenes)-1].ID,
			Group:      refValue,
			DurationMS: 0,
		}},
		From: -1,
		To:   -1,
	})

	handlers = append(handlers, models.EventHandler{
		EventName: "ButtonPressed",
		Conditions: map[string]models.EventCondition{
			"deviceId":   {EQ: config.TriggerDeviceID},
			"buttonName": {EQ: "DimUp"},
		},
		OneShot:     false,
		Priority:    90,
		TargetKind:  kind,
		TargetValue: refValue,
		Actions: models.EventAction{SetScene: &models.DeviceSceneAssignment{
			SceneID:    scenes[0].ID,
			Group:      refValue,
			DurationMS: 0,
		}},
		From: -1,
		To:   -1,
	})

	return handlers, toRemove
}

var myTrue = true
var myFalse = false